Tank



Oc t. 22, 1 92 J. A. STOUGH 1,732,779

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.Filed Jan. 9. 1928 INVENTOR Jay/ZJ/a ugh ATTORNEY 1 Patented Oct. 22, 1929 JAY A. STOUGH, OF TULSA, OKLAHOMA, ASSIGNOR, BY PHILIP CAREY MANUFACTURING- COMPANY, A

MESNE ASSIGNMENTS, TO THE CORPORATION OF OHIO TANK Application filed January 9; 1928. Serial No. 245,602.

My invention relates to oil storage tanks and more particularly to roofs of such tanks, the principal objects of the invention being to protect the contents of the tank from ignition by static electricity or lightning, to seal the tank against leakage of gases emanating from the contained liquid and to provide roof Fig. 1 is a perspective view of an oil stor--.

age tank embodying my invention.

Fig. 2 is an enlarged vertical sectional per spective of the upper part of a tank wall and a part of the roof structure;

Fig. 3 is a fragmentary sectional perspective view of the tank roof illustrating the attachment of a metallic bindingstrip to the roofing overla Fig. 4 is a ragmentary sectional perspective view of the tank roof illustrating the connection of the sections of a metallic binding strip.

Referring in detail to the drawings:

1 designates an oil storage tank of ordinary construction except for the improvements hereinafter described, comprising a cylindrical side wall 2 of sheet metal having a metallic angle ring 3 riveted to its upper edge with the horizontal flange 4 extending outwardly to receive the outer margin of roof covering 5, presently described. Posts 6 at- I tached to the side wall support beams 7 and girders 8 are supported from the beams and.

from a center pillar 9. v

Sheathing 10 is laid on the girders, and the roof covering is built up on the sheathing and flange 4, the roof covering being composed of alternate layers of different types of fiber sheets between which coatings of gas-proof and water-proof materials are interposed for sealing the covering elements together, the

elements comprising the completed covering being applied in the following order:

A layer of fabric roofing material 12, preferably asbestos, is first superimposed on the sheathing and over said angle ring flange, a

cement "coating13 impervious to water and gases is spread over the fabric element, and an overlying layer of insulating material 14, of sufficient thickness to provide insulation from sun rays, is applied to the cement and thereby sealed to the fabric. A second cement coating 15 similar to the coat' 13 is applied to the top surface of the insulating material, and a layer of roofing material 16, preferably comprising parallel bands or strips of asbestos overlappin' as indicated at 17, is laid onthe cement an thereby sealed to the insulating material.

A metallic sectional annulus or ring plate 18 overlies the outer portion of the roof covering, the inner portion of the annulus being sealingly connected with the band elements 16 by asbestos fibrated, flexible cement 19. The outer portion of the annulus is secured to the flange of the angle ring and conductively connected therewith by bolts 20; and lag bolts 21 secure the inner portion of the annulus-t0 the sheathing, the bolts. 20 and 21 extendinq. through the intervening roof covering elef' ments.

Overlying the overlapping edge of each of the parallel bands 16 is a sectional metallic strip 22; the strips 22, therefore, being parallel; and extending through the strips and; the built-up covering into the sheathing are nails 23 which secure the strips and other roof elements in close assembled relation with the sheathing. Thestrips thus engaged with the sheathing bind together the overlapped 9o edges of the bands 16.

The strips preferably comprise plane. portions 24 and boss-likeportions 25; and the' nails 23 are inserted through the boss-like portions so that expansion andeontraction of the strips will be absorbed by the boss-like portions without loosening the nails from the sheathing.- The adjacent ends-of the sec tions of which each strip is composed overlap as indicated atfl26 in Fig. 4 whereby conducstrip 28 being conductively connected with the metal annulus similarly to the connection of the strips 22 with the annulus.

The insulating elements of the roof covering associated as described, therefore, provide means for retaining gases, fumes and vapors and are respectively adapted for resisting deteriorating influences of sun rays and vapors, and are relatively non-conductive to electricity. The metal strips collect electricity from the atmosphere, and static electricity generated above the roof will be attracted to the strips, which will conduct electricity to the wall for discharge into the ground, thereby avoiding danger to the roof by lightning or from ignition of escaping gases by static sparks. 1

What I claim and desire to secure by Letters Patent is:

1. In a tank having a metallic side wall and a roof including elements non-conductive to-electricity, a conducting strip comprising overlapping sections each having a plurality of resilient bosses, the strip extending across the roof and having conductive relation with said side Wall, and means bearing on said resilient bosses engaging said elements and attaching the strip to the roof.

2. A tank of the character described including a metallic side wall, a metallic angle ring at the top of said wall, a covering overlying said ring including an element having overlapping edges, and a metallic sectional annular plate overlying the outer edge of the roof covering and bolted to said angle ring, spaced metallic strips binding said overlapping edges of the covering element, the outer ends of the strips bolted to the ring plate, and

s a transverse metallic strip conductively connected with the spaced metallic strips, the ends of the metallic strip being bolted to the plate. 7

3. In combination with a tank having a metallic side wall, a roof including strips of 4. In combination with a tank including I a metallic side wall and a top structure including sheathing and strips of non-conductive material above the sheathing having overlapping edges, fastening strips overlying the edges of the cover strips including upstanding bosses and fastening members extending through the bosses and non-conductive strips to said sheathing for attaching the non-conductive and conductive strips to the tank top, the ends of the fastening strips being in conductive relation with the side wall of the tank.

5. In combination with a tank having metallic side wall and a top including sheathing and parallel, transverse strips of nonconductive roofing material, fastening strips extending across thetank top having base portions covering the adjacent edges of the non-conductive strips and having upstanding expansion bosses, and fastening devices extending through said bosses to the tank top for attaching the fastening strips and cover strips to the roof, the ends of the fastening. strips being in conductive -relation with the side wall of the tank.

6. In combination with a tank having a metallic side wall and a top including sheathing and parallel transverse strips of nonconductive roofing material, fastening strips extending across the tank top having base portions covering the adjacent edges of the non-conductive strips and having upstanding expansion bosses, fastening devices extending through said bosses to the tank top for attaching the fastening strips and cover strips to the roof, the ends of the fastening strips being in conductive relation with the side wall of the tank, and a conductive strip extending across the'tank top in conductive relation with said fastening strips and with the side wall of the tank.

In testimony whereof I affix my signature.

JAY A. STOUGH.

non-conductive material having overlapping edges, attaching strips of conductive material including base portions overlying the lapping portions 0 the roof strips' and bosses integral with said base portions, and means extending through said bosses for attaching said strips to the tank. roof, the ends of said attaching strips being in conductive relation to the metallic wall of the tank. 

